MICROSTRUCTURE OF FINE-GRAINED BASALT FIBER CONCRETE ON CARBONATE FILLERS
Article Sidebar
Main Article Content
Abstract
The article presents the results of electron microscopic and X-ray structural studies of the microstructure of fine-grained basalt fiber concrete on carbonate aggregates of Crimean deposits.
Subject of research: fine-grained basalt fiber concrete on carbonate aggregates.
Materials and conclusions: Carbonate rocks – limestones of Crimean deposits, differing in genesis: marble-like, nummulite, limestone-shell rock; Portland cement CEM 142.5H (PC 500 TO) and basalt fibers RBR-18-T10/12 were selected as materials for research. The structure of the studied systems was studied using electron scanning microscopy on a SEM-106 microscope, X–ray diffraction analysis was performed on a DRON -2.0 diffractometer.
Results: Studies conducted using the electron microscope REM - 106, SELMI at 2000x magnification, showed that the area of contact between the fiber and the matrix with different fillers is characterized by dense contact of surfaces and the absence of cracks and gaps. Neoplasms representing Portland cement crystals are observed on the surface of the fibers themselves, and limestone filler particles are cemented with crystalline calcite CaCO3. X-ray phase analysis showed that the phase composition of the prototypes is mainly represented by non-hydrated Portland cement minerals C3S (d=1.765), C2S (d=2.883), C4AF (d=2.053), C3A (d=2.702), and hydrated cement stone minerals (Portlandite(OH)2, ettringite CaO AL2O3 3CaSO4 31H2O, bicalcium hydrosilicate Ca2SiO4 nH2O, etc.)
Conclusions: Electron microscopic studies of the basalt fiber surface have shown the absence or minimal degradation of fibers operating in an aggressive PC environment. X-ray phase analysis has established the features of the phase composition of a PC stone with basalt fiber. The contact zone of cement stone with basalt fiber and carbonate aggregate was studied and the effect of microstructure on the increase in adhesion between the components of basalt fiber concrete was shown.
Article Details
References
Минерально-сырьевая база строительной индустрии Крыма: Справочник / авт. – сост. Н.В. Любомирский, С.И. Федоркин. – Симферополь: ИТ «Ариал», 2021. – 540 с.
Farrain I. ContributionminiralogigueaI’ etiudedeL’ahdherenceentrelesconstituantshydratesdescimentsetlesmateriauxenrobes / I. Farrain// «Revuedesmateriauxdeconstructionettravauxpublics», 1956.–N490, 491, 492.
Журавлев В.Ф. Сцепление цементного камня с разными материалами / В.Ф Журавлев. Н.П. Штейнер // «Цемент», 1952. –№1.
Шрейберг А.К. Влияние породы и состояния камня на его сцепление с бетоном / А.К. Шрейберг, Г.И. Горчаков, Л.И. Абрамов //Изв. ВНИИГ, т.71. Л. –М., –1962.
Егоров И.И. О сцеплении цементного камня с поверхностью щебня и гравия / И.И. Егоров // Вестник Военно-инженерной академии им.Куйбышева, вып.65 М., 1952.
Ковалев И.И. Исследование прочностных свойств жесткого бетона для аэродромных покрытий. Автореф. Канд. Дисс. Л., 1958.
Фильченко И.Ф. Влияние качества щебня из карбонатных пород на свойства бетона. Автореф. Канд. Дисс. М.,1965.
Маилян Р.Л. Бетон на карбонатных заполнителях / Р.Л. Маилян // Изд-во Ростовского ун-та. – Ростов-на-Дону. – 1967. – 271с.